noun
the bulk :most of something :the largest part of something
[noncount] :the large size of someone or something
in bulk
in large containers or in large amounts
adjective
always used before a noun
of or relating to things that are sent or sold in large amounts
verb
bulks; bulked; bulking
bulk large
to have great importance or influence
bulk out
[phrasal verb]
bulk out (something) or bulk (something) out :to make (something) bigger or thicker by adding more material
bulk up
[phrasal verb]
to gain weight often by becoming more muscular
a bulk (someone) up :to cause (someone) to gain weight
b bulk up (something) or bulk (something) up :to make (something) bigger or thicker by adding more material